Hi,
when entering steam profile URL under profile settings I get the error:
Error
Your Steam profile link must be in the format www.steamcommunity.com/profiles/[your steam profile ID]
however that is not entirely accurate as my profile URL does not match this check:
http://steamcommunity.com/id/complexxl9

I have the same issue. When can we expect the field mask for our GFE profile to be updated so we can enter our Steam Profile URL as it is formatted by Steam?
Since the GFE profile expects a specific format, and Steam does not use that specific format, the problem lies on the side of GFE, not Steam. If the field mask is removed, or at least updated to the current Steam format, we would then be able to enter our Steam Profile URL information.
Edit:
I see this issue has been going on since December 2013. I guess we should not expect a resolution in the near future, should we?

I have the same issue. When can we expect the field mask for our GFE profile to be updated so we can enter our Steam Profile URL as it is formatted by Steam?

Since the GFE profile expects a specific format, and Steam does not use that specific format, the problem lies on the side of GFE, not Steam. If the field mask is removed, or at least updated to the current Steam format, we would then be able to enter our Steam Profile URL information.

Edit:
I see this issue has been going on since December 2013. I guess we should not expect a resolution in the near future, should we?